I have a barely used 8x6 SEF coil and a used but still good 4.5 x7 excelerator coil for the E Trac that I want to trade even for a 15x12 SEF coil. Both come with coil covers, but the 4.5 x7 has some marks from removing the cover to get out the dirt. It is also the most used on the bottom. I have a greater need for a larger coil since I hunt wide open woods and fields. I don't do parks and so the smaller coils don't really do me any good. I can provide pictures if need be (and allowed?) Thanks, George.